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fumes, or dust. Consequently, the poor quality of soil and groundwater must be mitigated in order for development and reoccupation of the Project Area to occur once again. Groundwater and Soil Contamination California Regional Water Quality Control Board monitors groundwater quality in the Project Area and issues quarterly reports documenting its findings. The Quarterly Monitoring Report for third quarter 2002 indicates that groundwater samples taken from 14 onsite and offsite wells serving the Project Area were contaminated. While groundwater contamination of the onsite wells is expected for the historic uses of the Project Area, the fact that the monitoring well located off the Project Area to the west was also contaminated indicates that the contamination plume has migrated outside of the Project Area into nonmilitary areas in the west/southwest directions. The Draft EIR further reveals that many of the onsite wells contain a high level of contamination, which include the following substances: petroleum hydrocarbons, petroleum hydrocarbons, benzene, toluene, methylbenzene and xylene compounds, methyl tertiary-butyl ether, di-isopropyl ether, ethyl-t- butyl ether, tert-amyl methyl ether, tert-butanol, ethanol, and methanol. The presence of these chemicals in groundwater can lead to a variety of short- and long-term health impacts to the health of the people living and working in contaminated buildings and facilities. Table B-2 lists the contaminants in the Project Area and their associated health impacts according to the US Environmental Protection Agency. ROSENOW SPEVACEK GROUP, INC. REDEVELOPMENT AGENCY OF THE CITY OF STOCKTON MAY 3, 2004 ROUGH AND READY ISLAND REDEVELOPMENT PROJECT - B-12 - PRELIMINARY REPORT